The WS19 was designed especially for AFVs (armoured fighting vehicles) and was used in almost
all kinds of vehicles throughout the armoured divisions.

With this purpose
in mind it was designed to give very clear speech so that RT conversations
could be kept up in a fast moving vehicle even through the noise of
the tank.

The 19 set was used in some areas of the forces as late as
1960.

The WS 19 Set Mark 3 gave three separate
services

"A set " sender-receiver (long range) between
different head quarters and between individual vehicles.

"B
set" sender-receiver (short range) between individual vehicles in a
troop or in a headquarters.

"IC amplifier" which is a telephone
intercommunications system between all members of the crew of a vehicle,
this is particularly important for the tank commander so that
he can speak to his gunner, driver etc and fight his tank.

Each member of the crew has one
headset and with some exceptions is provided with a switch to enable him
to use whichever set he wishes.

Both "A" and "B sets are
switched to SEND by means of the pressel switch in the microphone.

The "A" set has facilities for RT CW and MCW.

The "B"
set has facilities for RT only.

The "A" and "B" sets
each have a separate rod aerial

Range : -

"A" set.

The ranges
obtainable depend on many variable factors such as the intervening
country, frequency, time of day etc.

Approximate ranges obtainable on the
move with a 8' rod during daylight over average country in the British
Isles are : -

RT and MCW ..10 miles CW ..15 miles.

Greater ranges can
be obtained when conditions are good and by using longer aerials.

"B" set. 20" rod aerial ( not
adjustable ).
Up to 1 milein
open country, but reduced to about 300 yards by buildings, hills or
woods.